【Size】34-45 x 28-32cm, approximately 20L I am selling this because the size didn't fit me. It has only been tried on indoors. Please understand and consider purchasing. It will be placed in a Ziploc bag and a water-repellent cushioned envelope, and shipped via Yu-Packet Post. ・Protects your backpack from water droplets and dirt ・Water-repellent finish that prevents water from soaking in ・Elasticized for a snug fit and easy on/off ◎ ・Reflector on the logo mark